I'm having the same problem. When I first started using it 4 months ago, it would run my fridge for 4 days. Now I'm lucky to get 24 hours. When I drive it is yelling errors. I thought it was the fridge beeping but checked today to find tons of errors in one screen and not another. In the last...
Well the external expansion was made to retroactively work with the ac200p as well, so besides the new plugs if you have a working one you can still avail yourself! I bought mine from a reseller that has horrific customer service so let the wars begin. Oy.